Gate-valve-cooling system



SePt- 10, 1929- A. EoRcHARDT GATE VALVE: GooLINe sYsTEl Filed Teb. 1].r 1929 Patented Sept. l0, 1929.

UNITED STATES ANDREAS IBOBCHABDT, F HAMBORN-ON-THE-BHINE, GEBHANY.

GATE-VALVE-COOLIN G SYSTEM.

' Applicationled. February 11, 1929, Serial No. 339,141, and in Germany lay 3, 1928.

My invention relates to improvements in the method of and apparatus for cooling valves or gates for hot fluids, and more particularly in the method in which cooling water is circulated through cavities or passages made in the valves or gates. When the Water used for cooling the valves or gates is not previously purified, the chemical matter contained in the cooling water is gradually precipitated on the walls of the said cavities or passages, so that the cooling action is reduced. Further, the valves or gates and their seats are frequently deformed by differences of temperature,`and in gates for gas pipes the seats located at the intake side are frequently incrusted by precipitation of parts of the gas deposited thereon by cooling the seats. The change of the temperature of the parts of the gates or valves will be understood when considering that when opening the pipe the gate is located in the top part of the casing, where it is not exposed to `the actionof the hot gas, while the seats of the gates are acted upon by the hot gas, so that their temperature is considerably higher than that of the gate. If, however, the valve is closed, the temperature of the gate is higher than that of the seat.

The object of the improvements is to pro- 3o vide a method and a system in which the gate or valve and their seats are cooled so that their temperature is always substantially alike.

With this ob]ect` in view my invention consists in circulating the cooling water through passages made' in the members to be cooled such as rings or gates and through a container communicating therewith, the circulation being regulated so that the parts 40 to be cooled are always at uniform temperature. Preferably the container for the cooling water is connected at its top part with a condenser disposed at a higher level than the container, so that the water of condensation is automaticallyreturned to the container. p

For the purpose of explaining the inven-v tion an example embodying the same hasbeen shown in the accompanyingdrawing in which the same reference characters have vcondenser is located at a higher level than the container for collecting the cooling water.

In the example shown in the drawing the valve consists of a casing la provided with hollow rings b and b1 formingseats for the gate c. The gate c is4 connected with a stem d guided in a stuiling box 5. Any known or preferred means are provided for opening and closing the valve, such for example as gear wheels.

Above the casing a there is a container e for cooling water, which container is supported by means of pillars f on a plate supported by means of four pillars h an h1 on the casing a. lThe pillars h and h1 provide guides for a transverse member formed with two arms z' and l` and secured to the stem d, the arm z' being guided between the pillars h and the arm 1 between the pillars k1. The arms z', '1 are in tight engagement with they stem,

and as shown, they are xed to a conical co1- lar 6 of the stem and held in position thereon by means of a nut 7.

To the bottom part of the containere a pipe j is secured, which is connected at its bottom end to the plate g. In a stuing box 8 provided at the bottom end of the pipe j a pipe lc is guided which is fixed at its bottom end to the arm z'. Thus the pipe lc can follow the vertical movements of the gate c, the stem d andthe arm z'. The arm z' is provided with a passage m communicating with a passage n made in the stem d, and the passage n extends through a tubular extension p f. provided at the bottom part of the stem d and within the cavity of the gate c, the tubular container e su stantially at the middle offits Y valve t. Thus the height and below the level of the water contained therein, a stulling box 9l being' provided for producing a tight joint between the pipes [c1-and '12 Fromthe pipe jl a pipe g is branched o which' is bifurcated at its bottom end andis connected 'with arms g? and g2 connected with the top' parts ofthe cavities of the rings b and b1. The container eisV connected near its bottom by a pipe'r'for the sup ly of cooling water. vThev pipe r is prefera ly connected with a condenser a the `cooling pi s of .which are connected by a pipe rwwit the to Vpart of the containerve, the said pipe inclu inga pressure regulating steam developed within the container ye lis'condensed within the condenser V.s and the water of condensation'is returned tothe container e through the pipe r. In the'drawin the condenser s isshown .f substantially at t e same level'as the con tainer e, but I wish it to be understood that lThe operation' of t e duits q1, 9*, q an e'-pressure wit in the container e is alpractically the said condenser isdisposed at a higher level so that the water of condensation flows by gravit to the container -e.

Cooling water is circu ated, through the condenser through an intake pipe 'v and a discharge pipe w. Any air developed within the Y system escapesthrough a pipe'w.

The container e comprises a gage glass 10t showing the water level within the container,

a safety valve 11 and a manometer 12. Preferably the-safet Qvalve is set so that it blows higher Apressure than the 0H at a sli h pressure set y t e re lat1n`g valve t.

The container e and the passages connected therewith are lled with vwater to the level indicated in Fig. 1, the said water| flowing from the container through the conduits y, k, m, mp the gate c and through the co uits=j,lo, o1, o2 into the rings 11,61, and it rises within. the said` spacesy from the bottom part-thereof. Thereby the water which has een heated rwithin the said spaces rises upwardly by reason of its smaller specific gravity,the water flowing from the gate c upwardly through the'conduits m1, nl, k1 and jl and from the rin' b andblithrough the con- '1, and into the container e.

ways slightly lower than the pressure'within the cavities b, b1 and within c. Therefore, the

hot water returned throughthe pipe jl into,

system is as follows :,'y v

y circulation tainer elevated above said seats and valve,v vcirculation `within the condenser s, and the water of condensation is returned to the 'container e. Therefore the water of condensation performs al complete cycle, andspecial `means for circulating the Water are not needed.

Ordinarily a supply of fresh water may be dispensed with, because the vaporized water is returned to the container.

l yIn some cases the condenser s is dis ensed with, in which case the steam generate within the container e is usedfor other purposes. In' this case the water transformed into steam is replaced by a su ply of fresh water. In

other cases the ycircu ation of the water is carried out so that no steam is generated, and

the water is under atmospheric pressure, the comparatively cold water circulating through the system merely., by reason of the difference of the specific gravity of the hot and the cold water.

I wish it to be understood that the container e and the condenser s may be disposed laterally of and above the valve casing a.

While in describing the invention reference has been made to va particular example embodying the same I wish it to be understood that my invention is not limited to the construction shown in the drawing, and that various changes may be made in the general arrangement of the apparatus and the construction of yits parts without departing from the invention.

I claim:

1. A gate valve cooling system of the type lincluding water jacketed valve seats, a gate valve cooperating with the seats and having flow-paths therein, a Water conpipes Vextending downwardly from the container to said seats and valve,

also upwardly to the container from said' system operating to maintain less pressure in the container to which the hot vapors rise than in said seats and valve in which downwardly gravitationalvforce is-exerted by reason of the elevation of the container.

2. A. gatevalve coolin ,system of the type including water jackete valve seats, a ate valve. cooperating with the seats and avstem and arms having circulation ing circulation flow-paths therein, a water container elevated above said seats and valve, circulation pipes between the container and said seats comprising a main pipe extending downwardly from the container to said seats, a main pipe extending upwardly to the container from said seats, and branch pipes connected with said valve to move therewith and communicating with the iiow-paths therein, said branch pipes extending upwardly from said valve and having portions telescoping within and communicating with the main' pipes below the container.

3. A gate valve cooling system of the type including water jacketed valve seats, a gate valve cooperating with the seats, and having signature.

ANDREAS BORCHARDT.

a chamber therein, a stem for the valve pro- Y vided with inlet and outlet flow-paths communicating with the chamber, a water container above the seats `and stem, a main pipe extending downwardly from the container to the seatsand including a branch pipe communicating with the inlet How-path, whereby to supply cooling water to the seats and valve by gravitational force, a mainvpipe extendingupwardly to the container from the seats and including a branch pipe from the outlet flow-path, whereby to permit hot liquid and vapor to rise to the container from the seats and valve, said branch pipes being carried by the stem to move therewith and having portions slidably telescoping within the main pipes, and means arranged to seal the connection between the operating branch pipes and main pipes.

4. A gate valve cooling system of the type including water jacketed valve seats, a gate valve cooperating with the seats and provided with a stem, the valve and stem having circulation flow-paths therein, a water container elevated above said seats and stem, circulation pipes comprising a main pipe extending downwardly from the container to the seats, a main pipe extending upwardly tothe container from the seats, branch pipes connected with the valve stem to move 'therewith and communicating with the flow-paths therein, said branch pipes extending upwardly from the st em and having portions telescoping within and communicating with the main 'pipes belowthe container, and guide means `for the branch ipes.

5. A gate valve cooling system of the type including water jacketed valve seats, a gate valve cooperating with the seats and provided with a stem having lateral arms, the valve, How-paths therein, pillars rising from the casing and supporting a water container elevated above the stem and arms, said pillars forming guides for the stemV and arms, circulation pipes comprising a main pipe extending downwardly from thelcontainer to the seats, a main pipe extending upwardly to the conr tainer from the seats, branch pipes connect- 

